My thoughts after the Trailblazer TC, nelsons, and shift kit!!!
Nov 11, 2004 | 09:37 PM
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From: Hartland, Michigan
[QUOTE=Black02Z71]
i have put about 150 abusive miles on the truck since the installs everything seems to be holding good i dont think the tune is going to get any better i am overall very pleased!!
my truck doesnt seem to have a lock unlock problem. i know what you mean about the lock up being very noticable when mine lock just crusing my exhaust stays at a steady rumble and then it sounds like someone shut the truck off. they drop about 1000rpms too. i will try to get a video clip with my digital camara but i have no way of posting so maybe i could email them to you.
Originally Posted by TheLadiesMan
Im TC retarted!!! i have no idea what your talking about.
QUOTE]
Ok the TCC is the torque convertor clutch, and the pcm controls line pressure going to the clutch by a TCC PWM valve (pulse width modulation) The factory tune allows some slippable of the clutch. Now when you go and put a torque convertor in with a smaller lockup clutch it needs more line pressure to hold. On mine the rpm would drop 200-400 rpm for 3-5 sec then up 200-400 rpm for 3-5 sec and back again, it felt like it was locking and unlocking.
There are two ways to fix this. One is to block the TCC PWM valve in the transmission fully open, or what I did was adjust the table in the computer so it runs 98-100% duty cycle or full pressure all the time.
Now lockup is the most noticeable shift in my truck, it will drop over 1000 rpm instantly.
I am riding a 2002 MXZ 800, and hoping we get a real winter this year, one that lasts longer than a month. I have to get my trail perment soon $180 before dec 1., $230 after
QUOTE]
Ok the TCC is the torque convertor clutch, and the pcm controls line pressure going to the clutch by a TCC PWM valve (pulse width modulation) The factory tune allows some slippable of the clutch. Now when you go and put a torque convertor in with a smaller lockup clutch it needs more line pressure to hold. On mine the rpm would drop 200-400 rpm for 3-5 sec then up 200-400 rpm for 3-5 sec and back again, it felt like it was locking and unlocking.
There are two ways to fix this. One is to block the TCC PWM valve in the transmission fully open, or what I did was adjust the table in the computer so it runs 98-100% duty cycle or full pressure all the time.
Now lockup is the most noticeable shift in my truck, it will drop over 1000 rpm instantly.
I am riding a 2002 MXZ 800, and hoping we get a real winter this year, one that lasts longer than a month. I have to get my trail perment soon $180 before dec 1., $230 after
my truck doesnt seem to have a lock unlock problem. i know what you mean about the lock up being very noticable when mine lock just crusing my exhaust stays at a steady rumble and then it sounds like someone shut the truck off. they drop about 1000rpms too. i will try to get a video clip with my digital camara but i have no way of posting so maybe i could email them to you.
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